Hi welcome to HCMForum. As you describe it appears that there is a crack fracture
at the site of the hit. I advise you to consult an orthopedic surgeon for diagnosis and treatment. you may have to undergo Xray besides other routine tests for confermation of the condition.
Besides i advise you some diet recomendations, as avoid taking potato other tubers tomato egg and sea foods which are supposed to increase the sensitivity to pain. You may need to have plaster cast and immobilization for complete recovery.
Wishing for a quick recovery, and thanks for calling.